head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is variance, and it is a single point.

Execution · Pure Mechanics
A fast reflex platformer about swinging through hazardous environments precisely.

Execution · Pure Mechanics
Retro Studios' notoriously tough revival of Donkey Kong Country with relentless set-piece levels.
Alien Spidy leans Execution (Pure Mechanics); Donkey Kong Country Returns leans Execution (Pure Mechanics).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Alien Spidy
Quick swinging and precise reflexes define every level
Donkey Kong Country Returns
Demanding rocket-barrel and mine-cart sections, strict timing
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Alien Spidy
Solo platformer with no adaptive opponent
Donkey Kong Country Returns
Scripted hazards, no adaptation
Alien Spidy leans a little harder on variance, though the gap is small.
Alien Spidy
Hazards are fixed and learnable
Donkey Kong Country Returns
Hidden puzzle pieces, fixed once found
Donkey Kong Country Returns leans a little harder on optimization, though the gap is small.
Alien Spidy
Optimal pathing speeds collection runs
Donkey Kong Country Returns
KONG letters and time attack routes are learnable
A matching score does not mean a matching test. Two games can both sit at 10 on execution and demand completely different things of you - which is why the reasoning above matters more than the number beside it.